基础医学与临床 ›› 2018, Vol. 38 ›› Issue (6): 793-797.

• 研究论文 • 上一篇    下一篇

低氧微环境下胶质瘤干细胞表型的改变与RNA结合蛋白相关

李珊珊1,胡佩珊1,韩为2,彭小忠3   

  1. 1. 中国医学科学院基础医学研究所
    2. 中国医学科学院基础医学研究所 北京协和医学院基础学院
    3. 中国医学科学院 基础医学研究所 北京协和医学院 基础学院 医学分子生物学国家重点实验室
  • 收稿日期:2018-02-13 修回日期:2018-04-23 出版日期:2018-06-05 发布日期:2018-05-25
  • 通讯作者: 彭小忠 E-mail:pengxiaozhong@pumc.edu.cn
  • 基金资助:
    重点基础研发计划;国家自然科学基金;国家重点研发计划;中国医学科学院创新基金

Phenotype change of glioma stem cells is related with the RNA binding proteins in hypoxia

  • Received:2018-02-13 Revised:2018-04-23 Online:2018-06-05 Published:2018-05-25
  • Contact: Xiao-zhong PENG E-mail:pengxiaozhong@pumc.edu.cn

摘要: 目的 研究低氧微环境下胶质瘤干细胞表型变化与RNA结合蛋白表达之间的关系。方法 1% O2的低氧条件培养胶质瘤干细胞U87MG-SLC和GSC5,20% O2为常氧对照。分别利用MTS实验和肿瘤球形成实验检测其增殖能力和自我更新能力;Western blot检测干性相关蛋白和RNA结合蛋白表达水平的变化;通过吸光度扫描进行统计分析。结果 低氧条件下肿瘤干细胞的增殖能力下降(P<0.05),自我更新能力上升(P<0.05),HIF-1α和干性标志物Nestin和SOX2上调(P<0.01;P<0.05)。与常氧组相比,低氧组胶质瘤干细胞的多种RNA结合蛋白表达水平发生变化:hnRNPF、UNRIP以及HuD表达水平上调(P<0.05),PCBP2和UNR表达水平下调(P<0.01;P<0.05),而其他RNA结合蛋白(hnRNPK、 ADAR1、PCBP1、 CIRP、EBP1、eEF1A、PTBP1、PTBP2)表达水平没有显著性变化。结论 低氧微环境下,胶质瘤干细胞的表型变化与RNA结合蛋白hnRNPF、UNRIP、HuD、PCBP2和UNR表达水平相关。

关键词: 低氧, 胶质瘤干细胞, RNA结合蛋白, 增殖, 自我更新

Abstract: Objective To explore the relationship between the change of phenotype of glioma stem cells and the expression of RNA binding proteins in hypoxia. Methods Glioma stem cells (U87MG-SLC and GSC5) were cultured under normoxia (20%O2) and hypoxia (1%O2). Cell proliferation was measured by MTS assay and self-renewal ability was determined by tumorsphere formation assay. The expression of RNA binding proteins and stemness markers proteins were examined by Western blot and made statistics. Results The proliferation of glioma stem cells was inhibited and the self-renewal ability was promoted in hypoxia. Meanwhile, hypoxia significantly promoted the expression of HIF-1α and stemness markers.Under hypoxia, the expression of RNA binding proteins have changed. The expression of hnRNPF, UNRIP and HuD increased . Meanwhile the expression of PCBP2 and UNR was downregulated. But, other RNA binding proteins(hnRNPK, ADAR1, PCBP1, CIRP, EBP1, eEF1A,PTBP1,PTBP2)had no significant change. Conclusions The change of phenotype of glioma stem cells is related with the RNA binding proteins (hnRNPF,UNRIP,HuD,PCBP2 and UNR) in hypoxia.

Key words: hypoxia, glioma stem cell, RNA binding protein, proliferation, self-renewal ability

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